Peter Horton | e87ddde | 2006-02-12 17:10:25 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * (C) P. Horton 2006 |
| 3 | */ |
| 4 | |
| 5 | #include <linux/config.h> |
| 6 | #include <linux/init.h> |
| 7 | #include <linux/kernel.h> |
| 8 | #include <linux/console.h> |
| 9 | #include <linux/serial_reg.h> |
| 10 | #include <asm/addrspace.h> |
| 11 | #include <asm/mach-cobalt/cobalt.h> |
| 12 | |
| 13 | static void putchar(int c) |
| 14 | { |
| 15 | if(c == '\n') |
| 16 | putchar('\r'); |
| 17 | |
| 18 | while(!(COBALT_UART[UART_LSR] & UART_LSR_THRE)) |
| 19 | ; |
| 20 | |
| 21 | COBALT_UART[UART_TX] = c; |
| 22 | } |
| 23 | |
| 24 | static void cons_write(struct console *c, const char *s, unsigned n) |
| 25 | { |
| 26 | while(n-- && *s) |
| 27 | putchar(*s++); |
| 28 | } |
| 29 | |
| 30 | static struct console cons_info = |
| 31 | { |
| 32 | .name = "uart", |
| 33 | .write = cons_write, |
| 34 | .flags = CON_PRINTBUFFER | CON_BOOT, |
| 35 | .index = -1, |
| 36 | }; |
| 37 | |
| 38 | void __init cobalt_early_console(void) |
| 39 | { |
| 40 | register_console(&cons_info); |
| 41 | |
| 42 | printk("Cobalt: early console registered\n"); |
| 43 | } |